Bobbin support



Nov. 20, 1928. v 1,692,441

L. B. HAsBRoucK BOBBIN SUPPORT 3 Sheets-Sheet 1 y Original Filed Oct) 9, 1926 Mew ATTORN??v L B. IHASBRoucK om sorrow original Filed oct. 9", was j 5 spuwen v Patented Nov. 20, 1928.

UNITEDISTATES lPATENT OFFICE.

LOUIS B. HASBROUCK, OF ELMIRA, NEW YORK, ASSIGNOR TO ECLIPSE TEXTILE DE- VICES, IN C., OF ELMIRA, NEW YORK, A CORPORATION NEWKYORK.

BOBBIN SUIIORT.

Continuation of and substitute for applications Serial No 140,430, filed October 9, 1926, and Serial No. 149,050, filed NovemberA 18, 1926. This application filed 'May 2 6, 1928. Serial- No. 280,675.

This invention relates lto bobbin supports' and aims to provide an improved means for mounting roving bobbins on the creels of spinning frames and the like.

5 The presentl application is a continuation of and substitute for my two co-pending applications, Serial No. 140,430, liled October 9, 1926, and Serial No. 149,050, filed November 18, 1926, and is filed for the purpose of presenting the invention described in said applications in a single application.

In the operationof a spinning frame, any resistance to the rotation of the creel bobbins from which the rovings are drawn causes a backdraft on the rovings in addition to the intended draft of the drawing rolls, which has the effect of attenuating, or reducing the count of, the yarnvbeing spun.. While-it is desirable that such backdraft be' made as slight as possible, and various bobbin mountings have been devised or proposed with this in view, it is, I have ascertained, much more important that such backdraft as exists be niade uniform, both onpdift'erent rovings of the same frame, and on each roving through- A out the time that it is being unwound from a bobbin. It is Yonly by securing-such `uniformity in the backdraft that the yarns spun on the different spindles of the frame may be made Aof eXact-ly the same count, and each yarn may be made uniform throughout its length. The securing of this important result is an object attained by my invention.

Another object attained by the invention is to make possible changing the bobbins in the backrow of the creel without removing those in the front row. l.

Bobbin supports heretofore used have had spaced bearings or equivalent means for retaining t-he axis of each bobbin in a fixed position during the unwinding. I have discovered that such bearings are a .cause of irregular backdraft, owing to thc fact `that the lateral strains on the bobbins (which result lnot only from the pull of the rovingsbut also from eccentricity of the weight of the bobbin or more particularly of the mass of roving Wound thereon)` areV different.' in different bobbins, and, in each bobbin, vary during the unwinding of the roving thereon. The'varialtionin these lateralstrains causes 'irregular friction in bearings which resist lateral Inovement of the bobbin. I havediscovered, fur-v and .coveries, provides vfor supporting a bobbin .Well above its centerof gravity, and leaving it free to tip as well as to rotate about its suplport. .A bobbin-supporting device embodylng the invention in the form which I consider most desirable consists of a IiXed part attach-ed to the creel of a spinning frame, or its-equivalent, and a rotary part adapted to enga-ge a bobbin near one of its ends', and a combined bearing -and universal joint connecting the fixed and rotary parts. My invention is, however, not limited to this most desirable embodiment thereof.

In order that the invention may clearly be understood, I will describe inv detail the embodiments thereof, whichV` are shown in the accompanying drawings, in which:

Figs. 1, 2 and 3' are axial sections of thre bobbin supports each embodying the invention;

' Fig. 4 is a transverse sectional elevation of the upper part of a spinning frame of usual construction, showing the creel provided with bobbin supports of the form shown in 1;

creel, illustrating the .changing of a bobbin bins of the outer row Fig. is an axlal section of of bobbin support embodying the invention;

in theinner row Without removing-the bob- Fig. 7 is a section on lthe line 7--7 of Fig. 6. l

The bobbin support shown in Fig. 1, which I regard as the best form Aof the invention,

includes a fixed supporting member 10 and a. rotary bobbin-engaging memberI 12 connected by a single bearingll. The vfixed and rotary parts 10 and 12 are provided with instance serve as races for bearing balls 15 interposed between them. One of the bearing surfaces, in this instance the fixed surface anotherv form.

oppose-d bearing surfaces 13,14 Which-in this loo yis spherically curved, with its center of curvature ata point .16, located-.substantially on theaxis B1 cfa-bobbin B `carried by. the4 rotary part 12 and materially above the midvdle B2l of this bobbin.' The other bearing surface, 14, has the form of an ordinary ball race.

The parts of the bobbin support shown in Fig. 2 correspond to those of the bobbin support shown in Fig. 1, and are correspondingly numbered, but in this instance it is the movable bearing ,surface 14 which is spherically curved about a center 16', while the fixed bearing surface 13 has the form of an ordinary ball race.

Corresponding parts are found in the bobbin support shown in Fig. 3, but in this instance both the bearing surfaces 132 and 142 are spherically curved, and they are in direct Contact with each other, as no bearing balls are used.

It is apparent that in each of the modiications described, the leearincr is also a universal joint constraining the bobbin against movement at one point only, so that it is free to tip about this point in any direction. Since this point is near one end of the bobbin, the bobbin hangs with its axis vertical, or nearly so, but tips slightly under the inluence of any la-teral strains. But, such tipping in no way affects the operation of, 0r the resistance upon, the bearing which carries the bobbin. Consequently a variation in lateral strains on the bobbin causes no irregularity in the resistance to the rotation of the bobbin and no irregularity in the backdraft upon a roving drawn from it.

Figs. 6 and 7 show a bobbin support embodying the inveniton in a simplified, but I believe a4 less satisfactory, form. In this instance, the bobbin-engaging member 123 is suspended from a single ball bearing 113, as

in the supports shown in Figs. 1 and 2, but the bearing surfaces or races 133, 143 of the bearing 113 are of the conventional form, so that the bearing does not act as a universal joint. Nevertheless, as the bearing 113 is the sole connection between the ixed supporting member 103 and the bobbin-engaging member 123, the member 123 and the bobbin are free to tip about the bearing.

The particular construction of the bobbin supports illustrated is as follows:

In Fig. 1 the lixed member 10 includes a bolt 20 having a head 21 at its upper end and a nut 22 at its lower end.. The bolt may extend through a creel board C with its head against the upper surface of the board and its lower end projecting below the lower surj face thereof. On the bolt are mounted a dust cap 23, a spacing washer 24, and a spacing sleeve 25, which are locked against the lower surface of the creel board by the nut 22, and a bearing member resting on the nut and providing the bearing surface 13. The rotary member 12 consists of a sleeve having its upper edge turned in to provide a curved lip 26, which provides the bearing surface 14. It should be noted that sufficient clearance is allowed between the fixed and movable parts,

of the bobbin and hold it on the sleeve. Such means consist of two flat expansion springs 27 located within the sleeve below the nut 22, and provided with external bosses 28 which project through holes 29 in the sleeve. The sleeve has also an external annular rib 30 which serves to limit the extent to which a bobbin may be pushed upon the sleeve, by engaging the small internal shoulder B3 with which roving bobbins B are provided near their upper ends. At the same time, the peripheral surface of the rib 30 engages the enlarged bore of the bobbin above this shoulder, and thus cooperates with the gripping means holding the bobbin upon the sleeve.

It should be noted that the bobbin support which has been described `may be manufactured at'small cost because of the small number of parts of which it is composed, and because all of these parts, except those which are standard machine parts, may easily be made as stampings.

The construction of the bobbin support shown in Fig. 2 is identical with that of the support shown in Fig. 1, except for such changes in the form of the parts as are necessary to effect the interchange in the form of the bearing members hereinbefore described. The construction of the bobbin support shown in Fig. 3 is apparent from the drawing.

The construction of the bobbin support shown in Figs. 6 and 7 is identical with that shown in Fig. 1, except that the bolt 203 is inverted, so that it has its head 213 at its lower end and a nut 223 at its upper end; and an ordinary ball race '133 is used instead of the spherically curved bearing'surface 13.

The use of the bobbin supports shown in Figs. 1 and 2 is illustrated in Figs. 4 and 5 which show the creel of a spinning frame provided with such supports. The supports and bobbins which they carry depend from the creel boards. and suliicient clearance is allowed between the lower ends of the bobbins and the creel board below them to facilitate cleaning the upper surfaces of the. creel boards t-o remove the fly which tends to collect on them. In this connection, it should be noted that the onlyparts of the bobbin supports which project above the upper surfaces of the creel boards are the rounded heads 21 of the bolts, which in' no way interfere with such cleaning.

Removal of the bobbins from the supports and replacement of the bobbins thereon is accomplished easily and quickly. To remove a bobbin, it is necessary only to pull it downward to free its upper end from the spring hing having grips and the sleeve of its support. A bobbin 1s replaced by pushing its upper end up laround the sleeve until it engages the shoulder 30. In this operation, the sleeve is moved by tipping two `Aof the bobbins in the outer row suiciently to permit the passing of another bobbin between them.

The removal and replacement of the bobbins upon supports such as those shown in Fig. 3 is less convenient, since in order to remove a bobbin from the sleeve 122, it is necessary to lift the support 102 from the creel board into which its lower end projects.

What I claim is: l

1. The combination with the creel of a spinning frame and the like and a roving bobbin, of means for supporting the bobbin on the creel providing a bearing which 1s located well above the center of gravity of the bobbin, and with bobbin rotates and about which it is free to p2. A bobbin support for the creels of spinning frames cooperating bearing surfaces, means supporting said bearing and holding one of its bearing surfaces against rotation, and means for so suspending a bobbin from said bearing that it is free to rotate and to tip about the-fixed bearing surface of said-bearing.

3. The combination' with the creel of a spinning frame and the like and a bobbin whose center of gravity is at one side of its center line, of abobbin support comprising a fixed member secured to the creel and pro.- viding a fixed bearing surface, and means for so suspending one lend of the bobbin from said fixed bearing surface that it is free to rotate and -to tip about the fixed-bearing surface, so that it hangs face with its center of gravity directly under the center of the fixed bearing surface.

if. A bobbin support for the creels of spinning frames, comprising a fixed supporting member, a rotary bobbin-engaging'membcr,

- said members being formed to provide a single bearing between them, located above the center of gravity of the bobbin, which permits the rotary member to tip about the axis of the fixed member. o l 5,. A bobbin supp rt for the creels of spinning frames, comprising a ball bearing, means for supporting said ball bearing, and means for suspending the bobbin from said ball fixed and rotary members being respect to which the.

\ ter of gravity and movement at one point only, so that'it is and the like comprising a bear-- from the fixed bearing surbearing arranged to leave the bobbin free to i vtip about the bearing.

6. A bobbin support for the creels of spinning frames, comprising a fixed member, a

bearing thereon, a rotary bobbin-engaging member suspended from said bearing, said formed to permit the rotary member to tip about the axis of the bearing.

7 A bobbin support,comprising a sleeve having an inturned lip at its upper end, a ixedstud extending into said sleeve and terminating therein, an upt'urned ball race on said stud, and bearing balls between the race and the lip of the sleeve.

8. The combination with ya bobbin support, as claimed in claim 7, of a dust cap mounted on said stud above the sleeve, and havinga downwardly curved circumferential lip overlying and spaced from the inturned lip of the f sleeve. y

9. A bobbin support, comprising the combination with a set of bearing balls, of a fixed member supporting the balls, and a rotarybobbin-engaging member having a ball race resting-on the balls and free to be lifted from them, and means normally spaced from theA rotary member for limiting the upward movement thereof.

10. A bobbin support, providing a bearing supporting'the bobbin located above its cenconstraining it against free to tip about said point in any direction.

'-11'. A bobbin support, comprising a fixed4 part detachably engaging the `rotary parts providing opposed bearing surfaces at least one of which is spherically curved with itscenter fof curvature substantially on the axis of the bobbin and materially above the middle of the bobbin.,

13. A bobbin support, comprising fixed and rotary parts providing4 opposed ball races,

one of which has a spherically curved surface with its center of curvature substantially on the axis of the bobbin and materially above the middle ofthe bobbin, and bearing balls interposed between said races.

14. In a creel, the combinationwith a'creel i board, of a bobbin support comprising a bolt having a rounded` head and extending through the creel board from the upper side thereof, and a bobbin-engaging member mounted on the lower projecting end of said bolt, so that the only part of the support projecting above the upper surface of the creel board is the lroundedhead of the bolt.

15. A bobbin support for the creels of spinning frames and the like, comprising a supbearing connecting said parts,

the, frictional porting part supported by the creel and :i engaging part, providing opposed engaging 10 bobbin-engaging part, said parts being surfaces forming the sole connection between formed to provide a universal'joint which is them and at least one of which is spherically the sole connection between them and is 10- curved with its center of curvature substan- 5 cted above the center of gravity of a bobbin tially on the axis of the bobbin and materially carried by the support. above the middle of the bobbin. 15 16. A bobbin support for the cre/els of spin- In testimony whereof I have hereunto set ning frames and the like, comprising a supmy hand. porting part secured to the creel and a bobbin- LOUIS B. HASBROUCK. 

